Re: Compressed Filesystem

devzero
2008-12-16T18:14:23Z

> I'd much rather have just one compression scheme per FS. If people n=
eed
> a specific compression scheme for a specific file, they can just
> compress it in userland.

yes, i also think one compression scheme per FS is absolutely sufficien=
t.

> -----Urspr=FCngliche Nachricht-----
> Von: "Chris Mason" <chris.mason@oracle.com>
> Gesendet: 16.12.08 16:26:28
> An: Lee Trager <lt73@cs.drexel.edu>
> CC: linux-btrfs@vger.kernel.org
> Betreff: Re: Compressed Filesystem

> On Tue, 2008-12-16 at 10:20 -0500, Lee Trager wrote:
> > While I agree that the command you send should be possible it wasn'=
t
> > exactly what I was thinking. Currently I am working on a way for th=
e
> > user to individually set which files/directories they want compress=
ed or
> > not. What I was saying is that assuming you are in a mounted btrfs
> > directory you could do something like
> >=20
> > chattr -R +c zlib dir1 Compress dir1 and all its contents with zlib
> > chattr -R +c bzip dir2 Compress dir2 and all its contents with bzip
> > chattr +c lzo file1 Compress fil1 with lzo
> > chattr -c file2 Uncompress file2
> > chattr +c none dir3 Uncompress dir3 but leave contents as is
> >=20
> > If the user did something like=20
> > mount -o compress,cscheme=3Dzlib /dev/xyz /mntpoint
> > and then
> > chattr +c /mntpoint/dir
> > /mntpoint/dir would default to zlib as would anything else written =
to
> > the disk.
> >=20
>=20
> This is one of those places where more options isn't always better.
> Every option adds complexity to the filesystem and the testing matrix=
=2E =20
>=20
> I'd much rather have just one compression scheme per FS. If people n=
eed
> a specific compression scheme for a specific file, they can just
> compress it in userland.
>=20
> -chris
>=20
>=20
>=20

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